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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

First report of predation of Giardia sp cysts by ciliated protozoa and confirmation of predation of Cryptosporidium spp. oocysts by ciliate species

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Author(s):
Vidal Siqueira-Castro, Isabel Cristina [1, 2] ; Greinert-Goulart, Juliane Araujo [1, 3] ; Bonatti, Tais Rondello [1] ; Yamashiro, Sandra [1] ; Bueno Franco, Regina Maura [1]
Total Authors: 5
Affiliation:
[1] Univ Estadual Campinas, UNICAMP, Protozool Lab, Inst Biol, Campinas, SP - Brazil
[2] Cidade Univ Zeferino Vaz Rua, Rua Monteiro Lobato 255, BR-13083862 Campinas, SP - Brazil
[3] Reg Univ Blumenau FURB, Parasitol Lab, Blumenau, SC - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Environmental Science and Pollution Research; v. 23, n. 11, p. 11357-11362, JUN 2016.
Web of Science Citations: 4
Abstract

Ciliated protozoa are important components of the microbial food web in various habitats, especially aquatic environments. These organisms are useful bioindicators for both environmental quality assessment and the wastewater purification process. The pathogenic parasitic protozoan species Giardia and Cryptosporidium represent a significant concern for human health, being responsible for numerous disease outbreaks worldwide. The predation of cysts and oocysts in 15 ciliate species from water and sewage samples collected in Campinas, So Paulo, Brazil were verified under laboratory conditions. The ciliated protozoan species were selected based on their mode of nutrition, and only bacterivorous and suspension-feeders were considered for the experiments. The species Blepharisma sinuosum, Euplotes aediculatus, Sterkiella cavicola, Oxytricha granulifera, Vorticella infusionum, Spirostomum minus, and Stentor coeruleus ingested cysts and oocysts, the resistance forms of Giardia spp. and Cryptosporidium spp., respectively. This is the first time that the ingestion of Giardia cysts by ciliated protozoa has been reported. These findings may contribute to a better understanding of the biological removal of these pathogens from aquatic environments. (AU)

FAPESP's process: 10/16222-4 - Ciliate fauna, Giardia spp. cysts and Cryptosporidium spp. oocysts in activated sludge from a sewage treatment plant: assessment instruments and process control
Grantee:Regina Maura Bueno Franco
Support Opportunities: Regular Research Grants